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Hydric Soils Technical Note 12

More changes to "Field Indicators of Hydric Soils in the United States" (Version 4.0, March 1998).

Send comments to Wade Hurt.

The NTCHS met in Athens, Georgia in May 2001 and made the following changes and corrections.

Change 1: On page 9, Indicator A10, column 1, definition of the indicator, delete LRR R. The sentence will now read: A10. 2 cm Muck. For use in LRR M and N; for testing in LRRs A, B, C, E, K, L, S, W, X, Y, and Z.

Change 2: On page 18, Indicator F13, column 1, definition of the indicator. The first sentence now reads: In depressions and other concave landforms, a layer 25 cm (10 inches) or more thick starting within 15 cm (6 inches) of the soil surface in which the upper 15 cm (6 inches) must have value 3 or less and chroma 1 or less, and the lower 10 cm (4 inches) of the layer must have the same colors as above or any other color that has a chroma 2 or less.

Change 3: On page 18, Indicator F13, column 1, user notes. The first sentence now reads: Thickness requirements may be slightly less that those required for an umbric epipedon.

Change 4: On page 24, Glossary, add the following definition: g* - A horizon suffix indicating the horizon is grey due to wetness but not necessarily gleyed. All gleyed matrices (see definition below) should have the suffix "g"; however, all horizons with the "g" suffix are not gleyed. For example, a horizon with the color 10YR 6/2 that is at least seasonally wet, with or without other redoximorphic features, should have the "g" suffix.